WANG Gang,MIAO Rui-peng,ZHANG Zhen-chong,et al. Chemical Phosphorus Removal Efficiency of Rotating Biological Contactor with Addition of Polyaluminium Chloride [J].China Water & Wastewater,2020,36(13):50-54.
Chemical Phosphorus Removal Efficiency of Rotating Biological Contactor with Addition of Polyaluminium Chloride
China Water & Wastewater[ISSN:1000-4062/CN:12-1073/TU]
volume:
第36卷
Number:
13
Page:
50-54
Column:
Date of publication:
2020-07-01
- Keywords:
- rotating biological contactor (RBC); polyaluminium chloride; phosphorus removal; rotation speed; flocculation time
- Abstract:
-
Domestic wastewater in small town was treated by a rotating biological contactor (RBC), and the effects of adding polyaluminium chloride (PAC) inside the RBC on phosphorus removal and biofilm were explored. The experiment was carried out in an established RBC. The treatment capacity was 400 m3/d, and the average TP and PAC dosage were 2.11 mg/L and 60 mg/L. The removal efficiency of TP by adding PAC to RBC was significantly higher than that of the pipeline mixer, properties of the biofilm were good during this period, and the average removal efficiencies of COD and NH+4-N were 72.1% and 82.2%, respectively. When the dosing point was at backend of the RBC and the rotation speed was 0.6 r/min, the TP removal rate was 82.5%, and the effluent quality was better than the first class A specified in Discharge Standard of Pollutants for Municipal Wastewater Treatment Plant. The addition of PAC to RBC could achieve high phosphorus removal efficiency, and it had no adverse effect on the processing capacity of the system and biofilm.
Last Update:
2020-07-01